<!--    -->
<!-- What is a Cookie?

A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values.   -->

<!--  How to Create a Cookie?

The setcookie() function is used to set a cookie.  -->
<?php
$expire=time()+60*60*24*30;
setcookie("user", "Alex Porter", $expire);
?>

<html>
<body>


<!--  How to Retrieve a Cookie Value?

The PHP $_COOKIE variable is used to retrieve a cookie value.   -->
<?php
if (isset($_COOKIE["user"]))
  echo "Welcome " . $_COOKIE["user"] . "!<br />";
else
  echo "Welcome guest!<br />";
?>



<!--  How to Delete a Cookie?

When deleting a cookie you should assure that the expiration date is in the past.  -->
<?php
// set the expiration date to one hour ago
setcookie("user", "", time()-3600);
?>

</html>
</body>